Accu-Tac SR-5/ BR-4 Spikes for Bipod The Accu-Tac steel spikes are the perfect accessory for your bi-pod. They provide aggressive traction on dirt or any soft surfaces. They are CNC machined and black oxide treated. The replacement spikes have a simple screw on design for the SR-5 Bi-Pod that allows you to quickly change from rubber feet to steel spikes in seconds! Specifications: - Material: Aluminum Alloy / steel Hardware - Weight: 1.0 oz - Color : FLAT BLACK - Coating: A type III ( MIL-SPEC )Hard Anodize Made In The USA